//
//  UIButton+Extension.swift
//  weibo
//
//  Created by huangtuo on 16/6/3.
//  Copyright © 2016年 huangtuo. All rights reserved.
//

import UIKit

extension UIButton{
    //便利构造函数
    convenience init(imageName:String,backImageName:String){
        //调用其他构造函数初始化属性
        self.init()
        
        setImage(UIImage(named: imageName), forState: UIControlState.Normal)
        setImage(UIImage(named: imageName + "_highlighted"), forState: UIControlState.Highlighted)
        setBackgroundImage(UIImage(named: backImageName), forState: UIControlState.Normal)
        setBackgroundImage(UIImage(named: backImageName + "_highlighted"), forState: UIControlState.Highlighted)
        
        // 会根据背景图片的大小调整尺寸
        sizeToFit()
    }
    
    convenience init(title:String,color:UIColor,imageName:String){
        self.init()
        setTitle(title, forState: .Normal)
        setTitleColor(color, forState: .Normal)
        setBackgroundImage(UIImage(named: imageName), forState: .Normal)
    }
}





